At a young age he began working as a bricklayer, and some evenings he sang for free in the basement of a local puppet theatre where he entratained small audiences.

At that event, Vincenzo Acampora noticed Mario's talent and proposed him to sing at the Piedigrotta Festival, a well-known local show.

That night, he shared the stage with famous artists such as Giacomo Rondinella, Tecla Scarano and Nicla Di Bruno.

Soon, his fame started to build as he performed with famous singers Gennaro Pasquariello and Claudio Villa in Porta Capuana.

Because of his successful career, Mario Trevi was appointed to the Encyclopedia of the Neapolitan song by Ettore De Mura.

[11] On 24 September 2009 he participated in the Premio Carosone 2009, held at the Arena Flegrea, Mostra d'Oltremare in Naples, where he sang Indifferentemente, Scalinatella and Giacca Rossa 'e Russetto.

[16] On 17 April 2010 Mario Trevi starred a new beginning with Luna Bianca,[17] a live concert created to tour Italy.

In Luna Bianca, Trevi is accompanied by six young members of the Orchestra Luna Bianca and two young voices, performing the revisiting classic Neapolitan songs with new music arrangements consisting of accelerated rhythms combined with the folklore of the Neapolitan song, a remake Turbo-folk genre.